455778728 has 16 divisors (see below), whose sum is σ = 877682580. Its totient is φ = 221730048.

The previous prime is 455778727. The next prime is 455778731. The reversal of 455778728 is 827877554.

It can be written as a sum of positive squares in 2 ways, for example, as 391169284 + 64609444 = 19778^2 + 8038^2 .

It is a super-3 number, since 3×455778728³ (a number of 27 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 455778728.

It is not an unprimeable number, because it can be changed into a prime (455778727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 769601 + ... + 770192.

Almost surely, 2^455778728 is an apocalyptic number.

It is an amenable number.

455778728 is a deficient number, since it is larger than the sum of its proper divisors (421903852).

455778728 is a wasteful number, since it uses less digits than its factorization.

455778728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539836 (or 1539832 counting only the distinct ones).

The product of its digits is 4390400, while the sum is 53.

The square root of 455778728 is about 21348.9748700025. The cubic root of 455778728 is about 769.5757082263.

The spelling of 455778728 in words is "four hundred fifty-five million, seven hundred seventy-eight thousand, seven hundred twenty-eight".